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Anni [7]
3 years ago
12

A 500g sample of Potassium-40 is left to decay radioactively. After 3.9 x 109 years, about how many grams of Potassium-40 are ex

pected to remain? [The half-life of Potassium-40 is 1.3 x 109 years.]
Physics
2 answers:
ki77a [65]3 years ago
8 0
The answer is 62.5 grams
shusha [124]3 years ago
3 0
It is 62.5g i know for a fact i major and a teacher i'm science  and math
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Answer:

A and B

Explanation:

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The both data sets show that the body is accelerating. Also, they show that the body started from rest (0m/s) at a 0sec.

Data Set A shows a non-constant acceleration which has changing amount of velocity with change in time. While Data Set B shows a constant acceleration which has constant amount of velocity with change in time.

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What happens to the convection fluid as it heats up? How might this relate to masses of heated air?
Hitman42 [59]

Answer:

The convection process plays an important role in the liquid. Due to the increasing heat supply or high amount of temperature, the fluid gets heated up, as a result of which it becomes warm, less dense and eventually rises up forming convection cells.

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Scientists might make a computer model of volcanic eruptions. What is the
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7 0
1 year ago
A 2 kg box of taffy candy has 40j of potential energy relative to the ground. Its height above the ground is​
lord [1]

Answer:

2.04m

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PE=mgh

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h=40/19.64

h=2.04

8 0
2 years ago
Read 2 more answers
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